William gbay



(No Model.) W. GRAY.

Furnace. No. 233,614. Patented Oct. 26, I880.

N. PETERS. PHOTO'LITHDGRAPHER, WASHING-0N. D c.

UNITED STATES PATENT 'FFlCo WILLIAM GRAY, OF TORONTO, ONTARIO, CANADA.

FURNACE.

SPEGIFIGATION forming part of Letters Patent No. 233,614, dated October26, 1880. Application filed May 6, 1880. (No model.) Patented in CanadaApril 3, 1880.

To all whom it may concern Be it known that I, WILLIAM GRAY, of the cityof Toronto, in the county of York, in the Province of Ontario, Canada,engineer, have invented certain new and useful Improvements in Furnaces,of which the followingis a specification.

My invention has relation more particularly to asmoke-consumingattachment which is applicable to boiler and otherfurnaces, and, as the name indicates, is designed to prevent the passageof smoke from the furnace by causing it to be consumed therein.

In the operation of my invention I prefer to combine the attachment withthe door of the furnace, but do not confine myself to its use in anyparticular position on the furnace.

Referring to the accompanying drawings, Figures 1 and 2 are 'sections ofthe front of a furnace to which my invention is shown as applied. Fig. 3is a front view of the same.

A are the furnace-walls; B, the grate-bars; O, the door, and O, themetallic front or frame supporting the door.

D is aregulating-damper, hinged at the top to upper part of the door andinclosed at the ends by wings d d, which form a part of the door. Infront of this damper, on the furnace side, is placed a deflecting-plate,E, againstlhe lower edge of which the damper bears when closed, butwhich from this point of contact upward inclines inwardly toward thefurnace and away from the damper. The vertical sides of this plate areconnected to the door; but an opening is provided at the top for thepassage of air when the damper Dis opened. The damper is provided with apivoted pawl, D, which acts in connection with ratchet-teeth formed onthe deflecting-plate in such manner that the damper can be opened by themovement of the pawl-handle and held at any desired position but it isequally obvious that combined with the door the arrangementis moreconvenient, simple, and economical.

The advantages of my invention are that the escape and nuisance of smokeare prevented, and the smoke being entirely consumed I gain an economyof fuel.

I claim as my invention- 1. The combination, with a furnace-doorprovided with the deflecting-plate E, extending from the bottom of thedoor upwardly and at an inclination toward the furnace, and having sidewings, d d, of the hinged regulatingdamper D, said deflecting-plate,wings, and damper forming a passage for the admission of air to theupper part of the furnace, substantially as and for the purpose setforth.

2. The combination, with the deflectingplate E, provided with ratchetteeth, side wings, d d, and the hinged damper D, of the pivoted leverand pawl D, substantially as shown and described.

W. GRAY.

Witnesses:

Gno. W. GRo'rn, GEORGE A. AIRD.

